Ex-fling
ex-fling is when you hooked up with someone in the past
Jessica: is that your ex-fling?!
Amira: yes and imma fuck him again
Amira: yes and imma fuck him again
ex-fling
A person who one was previously casually dating.
Johnny went on a date with Rachel multiple times, but then realized she just wasn't the one. Rachel considers him an ex-fling. No big deal!